Outside-seal vacuum jar



Feb. 5, 1929. r 1,700,957

G. STAUNTON OUTSIDE SEAL VACUUM J AR Original Filed Aug, 27, 1926 jars.

'trated onthe drawings and hereinafterrmore fully described;

. r @n the drawings:

- manta at; 5', 1 1929;

,uNiTso STAT-ES 1,700,957 PATENT oFFmE."

' any smunzrom'on NE HAVEN, conmiorrcu'r, assmnon 'rovacuum snAL comram, 11m, o imw YORK, 1s. Y.,- A c onroan'rrou or NEW YORK.

OUTSIDE-SEAL vacuum Afillication fled luguit 27, 1926, Serial No.13f,883, Benewed deteber 3, 1928.

This invention relates to vacuum sealed "preserving jars. f,

It is an object of this invention to provide an improvediformmfoutsi'desealed vacuum The advantages of an outside seal lies in the smoothinterior surface of the'jar and in the avoidance of contamination of thecontents of the jar by coming into contact with the material comprisingthe gasket, which in p 110 an outside seal comprises only a verynarrowannular ring of highly compressed material,

highly iin ervious to the contents of the jar because o the compressedstate thereof.

@ther and further important objects of this is invention will beapparent from the disclov sures in the specification and accompany ng'drawings- The invention (in a preferredforin is illus- Figure l is anelevation of ajar partly broken away to show the features of thisinvention.

526 Figure 2 is an enlarged fragmentary-sec:

tion showing a detail of the seal. Figure .3 is at bottom view of thecover alone. As shown on the drawings: f

Y A preserving jar is indicated by the numer- 1 an al 10', the mouth ofthe jar having an external bulge or rin 11 which provides a sho lder 12for a rub ergask'et ring 13 'which is ini I tially of rectangular crosssection. A cover 14 is shown havlng a depending circumferential flange.15, the inner surface of which \has a narrow cylindrical surface 16merging into i an inwardly inclinedor slanting edge or conical surface17. i q

The cover is intended to be forced down over the gasket ring by creatinga vacuum within the jar. One means of creating such a vacuum is by theuse of a hand pump having a base fitting over the cover with lugsresting I on the shoulder 12 of the 'ar, clearance slots 5 18 beingprovided in the rim of the cover for these lugs. 'For a detaileddescription of'a suitable pump, reference may be made to my co pendingapplication Serial No. 41,003, filed July 2nd, 1925. -When such a pumpis used,

the cover serves as its own valve, rising when the pump is actuated andseating at the end of the pump stroke.- To 've an idea of the sealingpressures availab e, a jar of three (3) inches diameter eighty per centex- 'hausted, will have an atmospheric pressure of edgerof the cover asindicated at 19 in Figure 2. This provides a cushion support for thecover and also serves to improve the seal by providing a tortuouspassage for any possible leakage, the sharp inner corner 20 of the covermaking a veryfirm contact with the gasket.

T0 assist in opening a jarfonce sealed, a

notch 21 is provided to permit the insertion of v a pin 22, or othersharp instrument, between the gasket and cover, thus allowing air toen'- ter the jar alongside the pin to relieve the atmospheric pressureon the cover.

I am aware that numerous details of construction may be varied through awide range without departing from the principles of this J invention,and I. therefore do not purpose limiting the patdnt granted, otherwisethan necessitated by the prior art.

I claim as my invention: 1. In a device'of the class described, avessel. having an/external ring below the'rim thereof defining ashoulder with a cylindrical surface extending from said shoulder to saidrim, a resilie t asket ring positioned on said cylindrical s r ace, acover for said vessel having a downwardlyextending circumferentialflange, a narrow cylindrical surface on the lower inside edge ofsaidcover flan c, said narrow cylindrical surface being of t e normal outerdiameter of said gasket ring, and an inwardly tapering ,COIllCfi-lsurface merging with the cylindrical surface and the lower surface ofthe cover, whereby forcing said cover down over the vessel by creating avacuum therein will compress said gasket lower edge of said cover.

as a valve while creating a vacuum withinits rim shouldered to form aseat for a gas-- said jar, a peripheral dependin flange on said coverhaving an inner cylin rical lower surface of approximately the samediameter as the initial outer diameter of the gasket, said surfacemerging into an inwardly tapermg upper surface adapted to compress thegasket on said jar whereby said gasket is adapted to be forced outwardlybeneath the 3. In combination, in a Vacuum jar constructionwith anoutside seal of the class described, a container having the outer edgeof its rim shouldered to form a seat for a gasket, a gasket resting onsaid seat, and a cover normally disposed out of contact 'with the container when sealed thereto for cooperation with said gasket and arrangedto serve as a valve during the sealing of the container, said gasketwhen compressed bulging between the lower and cooperating edge of thecover and the shouldered edge of the container.

4. In combination, in a vacuum jar construction with an outside seal ofthe class described, a container shouldered to form a seat for a gasket,a gasket resting on said seat, and a cover normally disposed out ofcontact with the container when sealed thereto for cooperation with saidgasket having a slanting internal edge, said edge being positioned in aslanting plane between the horizontal and vertical so as to wedge thegasket on its seat and cause the gasket tobulge under the lower edge ofthe cover and over the shoulder on said jarf 5. Incombination, in avacuum jar construction, with an outside seal of the class described, acontainer having the outer edge of cover and the shouldered edge of thecon-' tainer, said cover having a flange with an edge disposed in aplane between the horizontal and vertical for engaging and compressingthe gasket upon its seat, the-flangebeing provided with a slot arrangedfor an instrument to be inserted therein and in subv stantial alignmentwith said last'mentioned edge, whereby the seal may be broken betweenthis edge and the gasket.

6. In combination, in a vacuum jar construction with an outside sealofthe class described, a container having the outer. edge of its rimshouldered to form a seat for a gas-v ket, a gasket resting on saidseat,and a cover normally disposed out of contact with the container.when sealed thereto for cooperation with said gasket and arranged toserve as a valve during the sealing of the container, said gasket whencompressed bulging 'between the lower and coo erating edge of the coverand the shoulder edgeof the container, said cover having a flange withan edge disposed in a plane between the horizontal and vertical forengaging and compressing the gasket upon its seat.

In testimony whereof I have hereunto subscribed my name.

GRAY. STAUNTON.

